Calculator



FIG. 1 is a front elevation view of a calculator showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a perspective view thereof; and,

FIG. 8 is a perspective view of another embodiment thereof. 

The ornamental design for a calculator, as shown. 